Issues in Hydraulic Design of Sanitary Sewers

David A. Chin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Various protocols are used in the hydraulic design of sanitary sewers, with key differences related to the assurance of self-cleansing, and the selection of Manning's n. Analyses reported in this paper show that (1) self-cleansing of sewer pipes should not generally be assessed based on a specified full-flow velocity, (2) the typical Manning's n values for specified pipe diameters recommended by ASCE are not generally appropriate, and (3) an exact analytic relationship between the minimum self-cleansing slope and the minimum flow rate can replace the empirical relations recommended by ASCE.

Original languageEnglish (US)
Article number04020016
JournalJournal of Environmental Engineering (United States)
Issue number4
StatePublished - Apr 1 2020
Externally publishedYes


  • Manning's n
  • Minimum slope
  • Self-cleansing

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Environmental Science(all)


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